RE: SQL tuning help

Sergei,

How many records in each table? What indexes are in these tables? What version of Oracle?

What do you mean by 'began to hang'?

I'd try making the attempts in the WHERE clause into a Between. I'd also try grouping by f.subsite_id.

You could always throw a Rule hint at it and see what happens.

Jerry Whittle
ACIFICS DBA
NCI Information Systems Inc.
jerome.whittle_at_scott.af.mil
618-622-4145

> -----Original Message-----
> From: Sergei [SMTP:sergei_at_netflip.com]
>
> Hello everybody,
>
> I have the following query that runs every week.
>
> UPDATE tmp_brian_metareward1 tmp
> SET offers_seen = (SELECT count(f.fastcash_id) FROM
> metareward.fastcash f
> WHERE f.subsite_id = tmp.subsite_id
> and attempt >= trunc(sysdate-1)
> and attempt < trunc(sysdate)
> group by tmp.subsite_id);
>
> This week it began to hang and I can't figure out why. No changes were
> made to a database. Please advise me on how I can tune it, which hints
> to add, or anything else I can do.
>
> Thank you
> Sergei

-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: Whittle Jerome Contr NCI
  INET: Jerome.Whittle_at_scott.af.mil

Fat City Network Services    -- 858-538-5051 http://www.fatcity.com
San Diego, California        -- Mailing list and web hosting services
---------------------------------------------------------------------
To REMOVE yourself from this mailing list, send an E-Mail message
to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in
the message BODY, include a line containing: UNSUB ORACLE-L
(or the name of mailing list you want to be removed from).  You may
also send the HELP command for other information (like subscribing).